Game Client Won't Launch

After finally figuring out how to log on, I tried to launch a custom game and it won't launch. After the timer reaches 0, pvp client will go to the tray and the game won't launch. So I've tried relogging in and hitting reconnect, and the same thing happens where the pvp client goes to the tray and nothing happens. Please help because I can't play. I've tried both admin and non-admin mode.